According to Wiki : "The Indian 10-rupee banknote (10) is a common denomination of Indian currency. It has been issued and had been in circulation since colonial times, and in continuous production since Reserve Bank of India took over the functions of the controller of currency in India in 1923. The security features of the 10-rupee banknote includes a windowed security thread that reads 'भारत' (Bharat in the Devanagari script) and 'RBI' alternately. The white field contains a watermark of Mahatma Gandhi that is a mirror image of the main portrait. The banknote also has raised text or intaglio. In addition the paper contains embedded fluorescent fibers. Since 2005 additional security features like machine-readable security thread, electrotype watermark, and year of print appears on the bank note."